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Describe the difference of rustc_lint vs rustc_lint_defs.

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Eric Huss 2021-05-25 17:05:34 -07:00 committed by Joshua Nelson
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src/diagnostics.md
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@ -484,9 +484,13 @@ module.
### Declaring a lint
The built-in compiler lints are defined in the [`rustc_lint`][builtin]
crate.
crate. Lints that need to be implemented in other crates are defined in
[`rustc_lint_defs`]. You should prefer to place lints in `rustc_lint` if
possible. One benefit is that it is close to the dependency root, so it can be
much faster to work on.
[builtin]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint/index.html
[`rustc_lint_defs`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint_defs/index.html
Every lint is implemented via a `struct` that implements the `LintPass` `trait`
(you also implement one of the more specific lint pass traits, either